What are decomposition reactions? Give one example each of a) Thermal decomposition b) Electrolytic decomposition c) Photolytic decomposition reaction.
Answers
Answer:
- physical state
- heat changes
- delta
Explanation:
Definition: A decomposition reaction is a reaction in which a compound breaks down into two or more simpler substances.
General form:The general form of a decomposition reaction is: AB→A+B.
input energy: Most decomposition reactions require an input of energy in the form of heat, light, or electricity.
Example: breakdown of water in hydrogen and oxygen
Types of decomposition reaction
(A) Thermal decomposition
definition: Some compounds break down when heated, forming two or more products from one reactant. This type of reaction is called thermal decomposition .
Example: Calcium carbonate (limestone or chalk) decomposes into calcium oxide and carbon dioxide when heated.
(B)Electrolytic decomposition
definition: Electrolytic decomposition may result when electric current is passed through an aqueous solution of a compound.
Example: A good example is the electrolysis of water. Electrolysis of water: Electrolysis of water is the decomposition of water into hydrogen and oxygen due to the passage of electric current through it.
(C)Photolytic decomposition
definition: The splitting or decomposition of a chemical compound by means of light energy or photons. Example: For example, the photolysis of water molecule in photosynthesis occurred under the influence of light. When photons are absorbed, it causes the hydrogen to bind to an acceptor, subsequently releasing the oxygen.